Statements given below are incorrect .write the correct statement.
1)Sodium metal reacts with hot water to form sodium hydroxide and hydrogen gas.
2)Zinc dissolves in sodium hydroxide to form zinc hydroxide and hydrogen gas.
3)In laboratory preparation of hydrogen gas,the reactants are alluminium and dilute sulphuric acid.
4)In laboratory preparation of hydrogen gas ferrous sulphate is used as catalyst.
5)The acid used to make acidulated water in the electrolysis of water is carbonic acid.
Answers
Answer:
1) Reaction of sodium with water
Sodium metal reacts rapidly with water to form a colourless solution of sodium hydroxide (NaOH) and hydrogen gas (H2). ... The reaction is exothermic. During the reaction, the sodium metal may well become so hot that it catches fire and burns with a characteristic orange colour.
2) zinc dissolve in NaoH to form zinc zincate and inflammable hydrogen
3) in attachment
4) Granulated zinc is ideal for the preparation of hydrogen gas in chemical laboratories because it usually contains a small amount of copper, which has the ability to act as a catalyst to the associated chemical reaction and, therefore, increase the rate of the chemical reaction without actually participating in it.
5) Pure water is a bad conductor of electricity, and electricity is required for electrolysis. Thus, to make water a conductor of electricity, an acid (I've known the acid as H2SO4) is added
